12145556 has 12 divisors (see below), whose sum is σ = 21511392. Its totient is φ = 5999448.

The previous prime is 12145537. The next prime is 12145561. The reversal of 12145556 is 65554121.

It is a happy number.

12145556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17960 + ... + 18623.

It is an arithmetic number, because the mean of its divisors is an integer number (1792616).

Almost surely, 2^12145556 is an apocalyptic number.

It is an amenable number.

12145556 is a deficient number, since it is larger than the sum of its proper divisors (9365836).

12145556 is a wasteful number, since it uses less digits than its factorization.

12145556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36670 (or 36668 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 12145556 is about 3485.0474889160. The cubic root of 12145556 is about 229.8647976654.

Adding to 12145556 its reverse (65554121), we get a palindrome (77699677).

The spelling of 12145556 in words is "twelve million, one hundred forty-five thousand, five hundred fifty-six".